If you construct a string such as -t foo and pass it via a variable to an external program, it is passed as a single, double-quoted argument (that is, donet will literally see “-t foo” on its command line) – and therefore won’t be recognized as parameter name-value combination. You must pass -t and foo … Read more
You have to reset all arguments. To change e.g. argument $3: $ set — “${@:1:2}” “new_arg3” “${@:4}” Basically you set all arguments to their current values, except for the one(s) that you want to change. set — is also specified by POSIX 7. The “${@:1:2}” notation is expanded to the two (hence the 2 in … Read more
import sys print(“\n”.join(sys.argv)) sys.argv is a list that contains all the arguments passed to the script on the command line. sys.argv[0] is the script name. Basically, import sys print(sys.argv[1:])
For those who subscribe to the motto “better late than never”, Visual Studio 2015 (version 19 of the compiler) now supports this. The new /source-charset command line switch allows you to specify the character set encoding used to interpret source files. It takes a single parameter, which can be either the IANA or ISO character … Read more
You can use the ProcessStartInfo.Arguments property to specify the string of arguments for your program: ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.FileName = @”C:\etc\Program Files\ProgramFolder\Program.exe”; startInfo.Arguments = @”C:\etc\desktop\file.spp C:\etc\desktop\file.txt”; Process.Start(startInfo);
As others answered, optparse is the best option, but if you just want quick code try something like this: import sys, re first_re = re.compile(r’^\d{3}$’) if len(sys.argv) > 1: if first_re.match(sys.argv[1]): print “Primary argument is : “, sys.argv[1] else: raise ValueError(“First argument should be …”) args = sys.argv[2:] else: args = () # … anywhere … Read more
As Ignacio said, ARG_MAX is the maximum length of the buffer of arguments passed to exec(), not the maximum number of files (this page has a very in-depth explanation). Specifically, it lists fs/exec.c as checking the following condition: PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *) / sizeof(void *) And, it seems, you have some additional limitations: On a 32-bit Linux, … Read more
The -static option links a program statically, in other words it does not require a dependency on dynamic libraries at runtime in order to run. To achieve static linking requires that the archive (.a) versions of your libraries exist on the system. so /usr/lib/libc.a, /usr/lib/crt1.o, etc. On modern linux systems (as you are using red … Read more
Use Bash’s indirection feature: #!/bin/bash n=3 echo ${!n} Running that file: $ ./ind apple banana cantaloupe dates Produces: cantaloupe Edit: You can also do array slicing: echo ${@:$n:1} but not array subscripts: echo ${@[n]} # WON’T WORK
For most cases you do not need an external parser. Scala’s pattern matching allows consuming args in a functional style. For example: object MmlAlnApp { val usage = “”” Usage: mmlaln [–min-size num] [–max-size num] filename “”” def main(args: Array[String]) { if (args.length == 0) println(usage) val arglist = args.toList type OptionMap = Map[Symbol, Any] … Read more